page_title: Radix auricularia
section_title: Anatomy
hierarchical_section_title: Radix auricularia / Anatomy
caption_attribution_description: English: Illustration from Natural History: Mollusca (1854), p. 20 - "Limneus Auricularis" [Radix auricularia]
context_page_description: Radix auricularia, common name the big-ear radix, is a species of medium-sized freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae.
  Radix auricularia is the type species of the genus Radix.
context_section_description: The body is flecked with small white spots on the back of the head and tentacles, but not on the foot. The mantle is pigmented with a line of dark spots along its edge, irregular spots which show through the shell. The foot is roundly elongated, 18 × 11 mm.
  The head is broad, auriculated. This species also has tentacles that are large, flat, lobate, triangular, fan-shaped and wider than they are high.
  The blood contains blue hemocyanin. The heart pulsations are slow and regular: thirty-four per minute. The animal is slow and deliberate in its movements.
  For a detailed description of Radix auricularia, including the radula and reproductive organs, see pages 179–183 in Baker F. C. The Lymnaeidae of North and Middle America, recent and fossil (1911). The Chicago Academy of Sciences.
caption: Drawing of a live Radix auricularia
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